非理想运行条件下双馈感应发电机转矩脉动抑制方法综述

doi:10.19595/j.cnki.1000-6753.tces.230920

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Abstract

Under non-sinusoidal and unbalanced operating conditions, the doubly fed induction generator (DFIG) encounters significant torque ripple issues, which can result in severe damage to the gearbox and drive shaft and threaten the safety and stable operation of the system. In recent years, numerous solutions have been proposed, but few have summarized these solutions. This paper classifies and summarizes the existing technical solutions, enabling scholars in related fields to quickly understand the research status and development trends of the technical solutions, and promote the further development of torque ripple suppression technology for DFIG.
Existing technical solutions can be divided into two categories: hardware structure improvement method and control strategy improvement method. The hardware structure improvement method mainly includes using multi-pulse rectifiers, adding passive filters and using voltage source converters. This kind of method can effectively suppress torque ripple, but requires changing the machine structure or adding additional equipment. As a result, the system cost is high, so that the hardware structure improvement method is often used in the system design stage. The control strategy improvement method is the most commonly used, including the torque closed-loop control method, the torque open-loop control method, the non-ideal component elimination method, and the multi-objective predictive control method. Among them, the torque closed-loop control method can achieve high precision torque control and has good system stability, but its target extensibility is low. Consequently, the torque closed-loop control method is often used in applications with high torque quality requirement. The torque open-loop control method has strong target extensibility, and is often employed in systems with multiple control targets. However, the torque open-loop control method has a high dependence on the machine parameters, so that the parameter perturbation would seriously affect the torque ripple suppression performance. The non-ideal component elimination method is relatively simple to control. Nevertheless, it generally cannot eliminate the non-ideal components of voltage and current simultaneously, so that the effect of torque ripple suppression is not satisfactory. As a consequence, the non-ideal component elimination method is usually adopted in applications with high voltage or current quality requirement. The multi-objective predictive control method can achieve multi-target collaborative optimization. However, there is no general method to optimize the weight factors for multiple control targets.
In the future, to restrain torque ripple more economically and effectively, the DFIG power generation system should adopt a collaborative suppression method combining both hardware structure and control strategy improvement methods. Additionally, the control strategy improvement method should be combined with parameter identification, parameter-free control and harmonic loss suppression to fully improve the machine parameter robustness and efficiency of the control system. Furthermore, the torque ripple suppression method under the fault state of the DFIG system should be further explored to improve the fault crossing ability of the system.

Key words： Non-sinusoidal operation unbalanced operation doubly-fed induction generator torque ripple suppression

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Cite this article:

Liu Yi,Zhang Maoxin,Xu Wei等. Review of Torque Ripple Suppression Methods for Doubly Fed Induction Generator Under Non-ideal Operating Conditions[J]. Transactions of China Electrotechnical Society, 0, (): 9034-34.

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